package com.j.lemon.learn;

import java.util.HashMap;
import java.util.concurrent.atomic.AtomicInteger;

public class StaticTest {
    private static HashMap<String, Integer> countMap = new HashMap<String, Integer>();

    public HashMap get(){
        System.out.println(countMap.size());
        return countMap;
    }

    public void put(){
        countMap.put("1",123);
    }

    public void put1(){
        countMap.put("2",123);
    }


    public static void main(String[] args) {
        StringBuilder stringBuilder = new StringBuilder();
        Long aaa = null;
        stringBuilder.append(aaa);
        System.out.println(stringBuilder.toString());
    }
}
